cacl.pas

这有很多Delphi应用的例子

unit Cacl;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Edit4: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

procedure CaculateRectangleArea(a:Integer;b:Integer);
implementation

{$R *.dfm}
Procedure CaculateRectangleArea(a:Integer;b:Integer);
Var
  S:Integer;
Begin
  S:=a*b;
  Form1.Edit3.Text:=InttoStr(S);
  a:=a*2;
End;

procedure TForm1.Button1Click(Sender: TObject);
var
  Length,Width:Integer;
begin
  Length:=StrtoInt(Edit1.Text);
  Width:=StrtoInt(Edit2.Text);
  CaculateRectangleArea(Length,Width);
  Edit4.Text:=InttoStr(Length);
end;

end.